Aztaka is a pretty nice metroidvania-ish (kinda) style of game, that I enjoyed playing through.
Fortix 2 is a Qix-style game, but with more complex enemy patterns and more stage features.
Those are the ones that I've played in the past. I don't know much about the other ones, but DEMISE is apparently supposed to be pretty nice, for those who like Wizardry/Bard's Tale style CRPGs.